Aldag, R., J. & Brief, A., P. (1979). Task design and employee motivation. Glenview Illinois: Scott, Foresman, and Company.
Arikunto, S. (2010). Prosedur penelitian suatu pendekatan praktek. Jakarta: PT Bina Aksara.
Azwar, S. (2015). Penyusunan skala psikologi (Edisi II). Yogyakarta: Pustaka Pelajar.
Buckworth, J., Lee, R. E., Regan, G., Schneider, L. K., & Diclemente, C. C. (2007). Decomposing intrinsic and extrinsic motivation for exercise: Application to stages of motivational readiness. Psychology of Sport and Exercise, 8, 441– 461.
Desideria, B. (2015). Ini hormon yang memengaruhi kebahagiaan anda. Article Liputan 6, Jakarta, http:// health.liputan6.com, 9 Januari, 2
Facturahman, R., & Cholik, M. (2014). Hubungan motivasi dengan prestasi belajar pada mata diklat sistem kopling siswa kelas XI di SMK Negeri 3 Surabaya. Jurnal Pendidikan Teknik Mesin, 3(1), 74–80.
Hatch, S., Thomsen, D., & Waldron, J. J. (2017). Extrinsic rewards and motivation. Article Association Applied Sport Psychology, 3.
Li, C. (2015). Validity and reliability of the Sport Motivation Scale-II for Chinese athletes. International Journal of Sport and Exercise Psychology, Volume 16 Issue 1.
Ocal, K & Sakalli, D. (2018). Turkish adaptation of the sport motivation scale II (SMS-II): Procedures of validity and reliability. Int J Sports Exerc & Train Sci, 2018, Vol 4, Issue 1, 39–48.
Pelletier, L. G., Rocchi, M. A., Vallerand, R. J., Deci, E. L., & Ryan, R. M. (2013). Validation of the revised sport motivation scale (SMS-II). Psychology of Sport & Exercise, 14(3), 329–341.
Purwono, U. (2010). 50 tahun Himpunan Psikologi Indonesia: Redefinisi psikologi Indonesia dalam keberagaman. In Supratiknya & T. Susana (Eds.). Jakarta: Himpunan Psikologi Indonesia.
Thomas, P., R. & Fogarty, G., J. (1997). Psychological skill training in golf: the role of individual differences in cognitive preferences. The Sport Psychologist, 11 (1), 86-106.
Vallerand. (2004). Intrinsic and extrinsic motivation in sport. Encyclopedia of Applied Psychology, 2, 427– 435
Vallerand, R. J., Pelletier, L. G., Blais, M. R., Hriere, N. M., Senecal, C., & Vallieres, E. F. (1992). The academic motivational scale: A measure of intrinsic, extrinsic, adn amotivation in education. Educational and Psychological Measurement, 52, 1003–1017.